?Suppose that the U. S. population for the years 1920, 1930, 1940, and 1950 is shown in the table below. Let x represent the number of decades since 1920. Find a cubic polynomial 
that fits these data.
?
Year 1920 1930 1940 1950 Population (in millions) 101 118 119 122?
A. ?
B. ?
C. ?
D. ?
E. ?
Answer: B
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Solve the problem by integration.Find the volume generated by revolving the first-quadrant area bounded by 
and 
about the 
A. 
?
B. 
?
C. 
?
D. 
?
Estimate the sum or difference by first rounding as indicated.Estimate by first rounding to the nearest hundred.2355
A. 9000 B. 8618 C. 8600 D. 8700
Solve the problem.A vendor sells hot dogs, bags of potato chips, and soft drinks. A customer buys 2 hot dogs, 4 bags of potato chips, and 3 soft drinks for $9.00. The price of a hot dog is $1.50 more than the price of a bag of potato chips. The cost of a soft drink is $3.00 less than the price of two hot dogs. Find the cost of each item.
A. $2.25 for a hot dog; $0.75 for a bag of potato chips; $1.00 for a soft drink B. $2.00 for a hot dog; $0.50 for a bag of potato chips; $1.00 for a soft drink C. $0.50 for a hot dog; $2.00 for a bag of potato chips; $1.00 for a soft drink D. $2.00 for a hot dog; $1.00 for a bag of potato chips; $0.50 for a soft drink
Find the period.y = -3 cos
A. ?
B. 
C. 3
D. 